#include<REGX52.H>
#include<INTRINS.H>
	
void Delay1ms(unsigned int xms)		//@12.000MHz
{
	unsigned char i, j;
    
    while(xms)
    {
        i = 2;
        j = 239;
        do
        {
            while (--j);
        } while (--i);
        xms--;
    }
	
}

void main()
{
    while(1)
    { 
        P2=0xFE;
        
        Delay1ms(100);
        P2=0xFD;
        
        Delay1ms(100);
        P2=0xFB;
        
        Delay1ms(100);
        P2=0xF7;
        
        Delay1ms(100);
        P2=0xFE;
        
        Delay1ms(100);
        P2=0xF7;
        
        Delay1ms(100);
        P2=0xEF;
      
        Delay1ms(100);
        P2=0xDF;
        
        Delay1ms(100);
        P2=0xBF;
        
        Delay1ms(100);
    }
}